Most Important MCQs of SCIENCE PART I for SSC Board Examination

Select the correct option and write only the alphabet corresponding to the correct option :

Select the correct option and write only the alphabet corresponding to the correct option :

When a ray of light travels from air to glass slab and strikes the surface of separation at 90°, then it ………….

(A) bends towards the normal
(B) bends away from the normal
(C) passes unbent
(D) passes in zigzag way

Select the correct option and write only the alphabet corresponding to the correct option :

…………. light is deviated the maximum in the spectrum of white light obtained with a glass prism.

(A) Red
(B) Yellow
(C) Violet
(D) Blue

Select the correct option and write only the alphabet corresponding to the correct option :

Select the correct option and write only the alphabet corresponding to the correct option :

Ice/water is a substance that ……….

(A) expands on melting and contracts on freezing
(B) contracts on melting and does not change in volume on freezing
(C) contracts on melting and expands on freezing
(D) does not undergo change in volume on melting or freezing

Select the correct option and write only the alphabet corresponding to the correct option :

When steam condenses to form water ………..

(A) heat is absorbed and temperature increases
(B) heat is absorbed and temperature remains the same
(C) heat is given out and temperature decreases
(D) heat is given out and temperature remains the same

Select the correct option and write only the alphabet corresponding to the correct option :

A glass slab is placed in the path of convergent light. The point of convergence of light:

(A) moves away from the slab
(B) moves towards the slab
(C) remains at the same point
(D) undergoes a lateral shift

Select the correct option and write only the alphabet corresponding to the correct option :

A ray of light strikes a glass slab at an angle of 50° with the normal to the surface of the slab. What is the angle of incidence ?

(A) 50°
(B) 25°
(C) 40°
(d) 100°

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In a double displacement reaction ……….

(A) ions remain at rest           (B) ions get liberated         

(C) ions are exchanged           (D) ions are not created

Select the correct option and write only the alphabet corresponding to the correct option :

In a chemical equation, the ………. are written on the left hand side.

(A) products           (B) reactants           

(C) catalysts           (D) elements